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Smithsonian National Museum of Natural History
GeoGallery
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GeoGallery
Actinolite
Albite (var. moonstone)
Alexandrites
Almandine schist
Amazonite
Amblygonite
Amethyst Heart Brooch
Amphibole-rock
Anatase
Andesite
Apatite
Apatite with microcline
Apophyllite with prehnite
Aragonite (var. flos ferri)
Arkose
Augen gneiss block
Aurichalcite with hemimorphite
Azurite in malachite
Azurite with malachite
Azurite with malachite
Azurite with malachite
Banded iron formation
Barite
Barite
Baryte
Baryte
Baryte with calcite
Basalt drill core
Basalt drill core
Basalt drill core
Basalt lava
Basaltic cinder
Beryl
Beryl
Beryl
Beryl ( var. aquamarine)
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